As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF ROLL AT 90KTS THE NR 1 ENGINE LOW OIL RED CAS MESSAGE CAME ON AND THE OIL PRESSURE GAUGE DROPPED BELOW 20 PSI. TROUBLESHOOT TO A LEAKING AGB FWD HYD PUMP SHIFT CARBON SEAL. REMOVED SEAL AND INSTALLED A NEW SEAL. REPLACED OIL PUMP IAW ER. PUMP PRESSURE CHECK GOOD. LEAK CHECKS GOOD.